Keep your basket out of constant direct sunlight. Do not store your basket in an area that is humid, very cold or very hot. Too much moisture can cause mold and extreme temperatures cause cracking and brittle structure.
Remove your basket from any areas where it might pick up grease or soot, such as near a stove or fireplace. Both of these elements can be difficult or impossible to remove.
Dust your basket with a clean paintbrush or a feather duster every week. Clean any particularly soiled areas gently with a damp cotton cloth. Allow the basket to dry thoroughly before placing anything in it.
Handle your willow basket with clean hands. Lotion or natural oil from your skin can damage the basket and contribute to mold growth.